Angular @Input Guide: Step-by-Step Usage

The @Input decorator is used in Angular components to create an input property, allowing data to be passed from a parent component to a child component.

To use the @Input decorator, follow these steps:

Import the Input decorator before declaring the input property in the child component class.

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Use the following code to bring in the Component and Input modules from the ‘@angular/core’ library.

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Use the @Input decorator before the property that needs to receive data from the parent component.

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@Input() myInputProperty: any;

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In the template of the child component, this property can be used to display the passed data.

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{{ the property that I inputted }}

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4. In the template of the parent component, pass data to the child component through property binding.

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In the code above, `parentData` is a property in the parent component that will be passed to the `myInputProperty` attribute in the child component through property binding.

This way, when the ‘parentData’ property of the parent component changes, the ‘myInputProperty’ property of the child component will also be updated synchronously and display the new value in the template.